368 lines
14 KiB
C++
368 lines
14 KiB
C++
/*************************************************************************/
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/* audio_stream_player.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "audio_stream_player.h"
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#include "core/config/engine.h"
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#include "core/math/audio_frame.h"
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#include "servers/audio_server.h"
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void AudioStreamPlayer::_notification(int p_what) {
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if (p_what == NOTIFICATION_ENTER_TREE) {
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if (autoplay && !Engine::get_singleton()->is_editor_hint()) {
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play();
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}
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}
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if (p_what == NOTIFICATION_INTERNAL_PROCESS) {
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Vector<Ref<AudioStreamPlayback>> playbacks_to_remove;
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for (Ref<AudioStreamPlayback> &playback : stream_playbacks) {
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if (playback.is_valid() && !AudioServer::get_singleton()->is_playback_active(playback) && !AudioServer::get_singleton()->is_playback_paused(playback)) {
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emit_signal(SNAME("finished"));
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playbacks_to_remove.push_back(playback);
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}
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}
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// Now go through and remove playbacks that have finished. Removing elements from a Vector in a range based for is asking for trouble.
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for (Ref<AudioStreamPlayback> &playback : playbacks_to_remove) {
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stream_playbacks.erase(playback);
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}
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if (!playbacks_to_remove.is_empty() && stream_playbacks.is_empty()) {
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// This node is no longer actively playing audio.
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active.clear();
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set_process_internal(false);
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}
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}
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if (p_what == NOTIFICATION_EXIT_TREE) {
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for (Ref<AudioStreamPlayback> &playback : stream_playbacks) {
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AudioServer::get_singleton()->stop_playback_stream(playback);
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}
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stream_playbacks.clear();
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}
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if (p_what == NOTIFICATION_PAUSED) {
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if (!can_process()) {
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// Node can't process so we start fading out to silence
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set_stream_paused(true);
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}
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}
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if (p_what == NOTIFICATION_UNPAUSED) {
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set_stream_paused(false);
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}
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}
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void AudioStreamPlayer::set_stream(Ref<AudioStream> p_stream) {
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stop();
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stream = p_stream;
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}
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Ref<AudioStream> AudioStreamPlayer::get_stream() const {
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return stream;
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}
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void AudioStreamPlayer::set_volume_db(float p_volume) {
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volume_db = p_volume;
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Vector<AudioFrame> volume_vector = _get_volume_vector();
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for (Ref<AudioStreamPlayback> &playback : stream_playbacks) {
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AudioServer::get_singleton()->set_playback_all_bus_volumes_linear(playback, volume_vector);
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}
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}
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float AudioStreamPlayer::get_volume_db() const {
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return volume_db;
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}
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void AudioStreamPlayer::set_pitch_scale(float p_pitch_scale) {
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ERR_FAIL_COND(p_pitch_scale <= 0.0);
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pitch_scale = p_pitch_scale;
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for (Ref<AudioStreamPlayback> &playback : stream_playbacks) {
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AudioServer::get_singleton()->set_playback_pitch_scale(playback, pitch_scale);
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}
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}
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float AudioStreamPlayer::get_pitch_scale() const {
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return pitch_scale;
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}
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void AudioStreamPlayer::set_max_polyphony(int p_max_polyphony) {
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if (p_max_polyphony > 0) {
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max_polyphony = p_max_polyphony;
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}
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}
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int AudioStreamPlayer::get_max_polyphony() const {
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return max_polyphony;
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}
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void AudioStreamPlayer::play(float p_from_pos) {
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if (stream.is_null()) {
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return;
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}
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ERR_FAIL_COND_MSG(!is_inside_tree(), "Playback can only happen when a node is inside the scene tree");
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if (stream->is_monophonic() && is_playing()) {
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stop();
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}
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Ref<AudioStreamPlayback> stream_playback = stream->instance_playback();
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ERR_FAIL_COND_MSG(stream_playback.is_null(), "Failed to instantiate playback.");
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AudioServer::get_singleton()->start_playback_stream(stream_playback, bus, _get_volume_vector(), p_from_pos, pitch_scale);
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stream_playbacks.push_back(stream_playback);
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active.set();
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set_process_internal(true);
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while (stream_playbacks.size() > max_polyphony) {
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AudioServer::get_singleton()->stop_playback_stream(stream_playbacks[0]);
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stream_playbacks.remove(0);
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}
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}
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void AudioStreamPlayer::seek(float p_seconds) {
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if (is_playing()) {
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stop();
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play(p_seconds);
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}
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}
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void AudioStreamPlayer::stop() {
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for (Ref<AudioStreamPlayback> &playback : stream_playbacks) {
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AudioServer::get_singleton()->stop_playback_stream(playback);
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}
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stream_playbacks.clear();
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active.clear();
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set_process_internal(false);
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}
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bool AudioStreamPlayer::is_playing() const {
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for (const Ref<AudioStreamPlayback> &playback : stream_playbacks) {
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if (AudioServer::get_singleton()->is_playback_active(playback)) {
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return true;
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}
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}
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return false;
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}
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float AudioStreamPlayer::get_playback_position() {
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// Return the playback position of the most recently started playback stream.
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if (!stream_playbacks.is_empty()) {
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return AudioServer::get_singleton()->get_playback_position(stream_playbacks[stream_playbacks.size() - 1]);
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}
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return 0;
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}
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void AudioStreamPlayer::set_bus(const StringName &p_bus) {
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bus = p_bus;
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for (const Ref<AudioStreamPlayback> &playback : stream_playbacks) {
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AudioServer::get_singleton()->set_playback_bus_exclusive(playback, p_bus, _get_volume_vector());
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}
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}
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StringName AudioStreamPlayer::get_bus() const {
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for (int i = 0; i < AudioServer::get_singleton()->get_bus_count(); i++) {
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if (AudioServer::get_singleton()->get_bus_name(i) == String(bus)) {
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return bus;
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}
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}
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return SNAME("Master");
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}
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void AudioStreamPlayer::set_autoplay(bool p_enable) {
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autoplay = p_enable;
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}
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bool AudioStreamPlayer::is_autoplay_enabled() {
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return autoplay;
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}
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void AudioStreamPlayer::set_mix_target(MixTarget p_target) {
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mix_target = p_target;
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}
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AudioStreamPlayer::MixTarget AudioStreamPlayer::get_mix_target() const {
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return mix_target;
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}
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void AudioStreamPlayer::_set_playing(bool p_enable) {
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if (p_enable) {
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play();
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} else {
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stop();
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}
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}
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bool AudioStreamPlayer::_is_active() const {
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for (const Ref<AudioStreamPlayback> &playback : stream_playbacks) {
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if (AudioServer::get_singleton()->is_playback_active(playback)) {
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return true;
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}
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}
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return false;
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}
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void AudioStreamPlayer::set_stream_paused(bool p_pause) {
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// TODO this does not have perfect recall, fix that maybe? If there are zero playbacks registered with the AudioServer, this bool isn't persisted.
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for (Ref<AudioStreamPlayback> &playback : stream_playbacks) {
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AudioServer::get_singleton()->set_playback_paused(playback, p_pause);
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}
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}
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bool AudioStreamPlayer::get_stream_paused() const {
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// There's currently no way to pause some playback streams but not others. Check the first and don't bother looking at the rest.
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if (!stream_playbacks.is_empty()) {
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return AudioServer::get_singleton()->is_playback_paused(stream_playbacks[0]);
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}
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return false;
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}
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Vector<AudioFrame> AudioStreamPlayer::_get_volume_vector() {
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Vector<AudioFrame> volume_vector;
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// We need at most four stereo pairs (for 7.1 systems).
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volume_vector.resize(4);
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// Initialize the volume vector to zero.
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for (AudioFrame &channel_volume_db : volume_vector) {
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channel_volume_db = AudioFrame(0, 0);
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}
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float volume_linear = Math::db2linear(volume_db);
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// Set the volume vector up according to the speaker mode and mix target.
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// TODO do we need to scale the volume down when we output to more channels?
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if (AudioServer::get_singleton()->get_speaker_mode() == AudioServer::SPEAKER_MODE_STEREO) {
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volume_vector.write[0] = AudioFrame(volume_linear, volume_linear);
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} else {
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switch (mix_target) {
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case MIX_TARGET_STEREO: {
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volume_vector.write[0] = AudioFrame(volume_linear, volume_linear);
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} break;
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case MIX_TARGET_SURROUND: {
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// TODO Make sure this is right.
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volume_vector.write[0] = AudioFrame(volume_linear, volume_linear);
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volume_vector.write[1] = AudioFrame(volume_linear, /* LFE= */ 1.0f);
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volume_vector.write[2] = AudioFrame(volume_linear, volume_linear);
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volume_vector.write[3] = AudioFrame(volume_linear, volume_linear);
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} break;
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case MIX_TARGET_CENTER: {
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// TODO Make sure this is right.
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volume_vector.write[1] = AudioFrame(volume_linear, /* LFE= */ 1.0f);
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} break;
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}
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}
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return volume_vector;
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}
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void AudioStreamPlayer::_validate_property(PropertyInfo &property) const {
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if (property.name == "bus") {
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String options;
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for (int i = 0; i < AudioServer::get_singleton()->get_bus_count(); i++) {
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if (i > 0) {
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options += ",";
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}
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String name = AudioServer::get_singleton()->get_bus_name(i);
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options += name;
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}
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property.hint_string = options;
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}
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}
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void AudioStreamPlayer::_bus_layout_changed() {
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notify_property_list_changed();
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}
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Ref<AudioStreamPlayback> AudioStreamPlayer::get_stream_playback() {
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if (!stream_playbacks.is_empty()) {
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return stream_playbacks[stream_playbacks.size() - 1];
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}
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return nullptr;
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}
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void AudioStreamPlayer::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_stream", "stream"), &AudioStreamPlayer::set_stream);
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ClassDB::bind_method(D_METHOD("get_stream"), &AudioStreamPlayer::get_stream);
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ClassDB::bind_method(D_METHOD("set_volume_db", "volume_db"), &AudioStreamPlayer::set_volume_db);
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ClassDB::bind_method(D_METHOD("get_volume_db"), &AudioStreamPlayer::get_volume_db);
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ClassDB::bind_method(D_METHOD("set_pitch_scale", "pitch_scale"), &AudioStreamPlayer::set_pitch_scale);
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ClassDB::bind_method(D_METHOD("get_pitch_scale"), &AudioStreamPlayer::get_pitch_scale);
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ClassDB::bind_method(D_METHOD("play", "from_position"), &AudioStreamPlayer::play, DEFVAL(0.0));
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ClassDB::bind_method(D_METHOD("seek", "to_position"), &AudioStreamPlayer::seek);
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ClassDB::bind_method(D_METHOD("stop"), &AudioStreamPlayer::stop);
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ClassDB::bind_method(D_METHOD("is_playing"), &AudioStreamPlayer::is_playing);
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ClassDB::bind_method(D_METHOD("get_playback_position"), &AudioStreamPlayer::get_playback_position);
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ClassDB::bind_method(D_METHOD("set_bus", "bus"), &AudioStreamPlayer::set_bus);
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ClassDB::bind_method(D_METHOD("get_bus"), &AudioStreamPlayer::get_bus);
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ClassDB::bind_method(D_METHOD("set_autoplay", "enable"), &AudioStreamPlayer::set_autoplay);
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ClassDB::bind_method(D_METHOD("is_autoplay_enabled"), &AudioStreamPlayer::is_autoplay_enabled);
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ClassDB::bind_method(D_METHOD("set_mix_target", "mix_target"), &AudioStreamPlayer::set_mix_target);
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ClassDB::bind_method(D_METHOD("get_mix_target"), &AudioStreamPlayer::get_mix_target);
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ClassDB::bind_method(D_METHOD("_set_playing", "enable"), &AudioStreamPlayer::_set_playing);
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ClassDB::bind_method(D_METHOD("_is_active"), &AudioStreamPlayer::_is_active);
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ClassDB::bind_method(D_METHOD("set_stream_paused", "pause"), &AudioStreamPlayer::set_stream_paused);
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ClassDB::bind_method(D_METHOD("get_stream_paused"), &AudioStreamPlayer::get_stream_paused);
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ClassDB::bind_method(D_METHOD("set_max_polyphony", "max_polyphony"), &AudioStreamPlayer::set_max_polyphony);
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ClassDB::bind_method(D_METHOD("get_max_polyphony"), &AudioStreamPlayer::get_max_polyphony);
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ClassDB::bind_method(D_METHOD("get_stream_playback"), &AudioStreamPlayer::get_stream_playback);
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ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "stream", PROPERTY_HINT_RESOURCE_TYPE, "AudioStream"), "set_stream", "get_stream");
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ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "volume_db", PROPERTY_HINT_RANGE, "-80,24"), "set_volume_db", "get_volume_db");
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ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "pitch_scale", PROPERTY_HINT_RANGE, "0.01,4,0.01,or_greater"), "set_pitch_scale", "get_pitch_scale");
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ADD_PROPERTY(PropertyInfo(Variant::BOOL, "playing", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_EDITOR), "_set_playing", "is_playing");
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ADD_PROPERTY(PropertyInfo(Variant::BOOL, "autoplay"), "set_autoplay", "is_autoplay_enabled");
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ADD_PROPERTY(PropertyInfo(Variant::BOOL, "stream_paused", PROPERTY_HINT_NONE, ""), "set_stream_paused", "get_stream_paused");
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ADD_PROPERTY(PropertyInfo(Variant::INT, "mix_target", PROPERTY_HINT_ENUM, "Stereo,Surround,Center"), "set_mix_target", "get_mix_target");
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ADD_PROPERTY(PropertyInfo(Variant::INT, "max_polyphony", PROPERTY_HINT_NONE, ""), "set_max_polyphony", "get_max_polyphony");
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ADD_PROPERTY(PropertyInfo(Variant::STRING_NAME, "bus", PROPERTY_HINT_ENUM, ""), "set_bus", "get_bus");
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ADD_SIGNAL(MethodInfo("finished"));
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BIND_ENUM_CONSTANT(MIX_TARGET_STEREO);
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BIND_ENUM_CONSTANT(MIX_TARGET_SURROUND);
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BIND_ENUM_CONSTANT(MIX_TARGET_CENTER);
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}
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AudioStreamPlayer::AudioStreamPlayer() {
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AudioServer::get_singleton()->connect("bus_layout_changed", callable_mp(this, &AudioStreamPlayer::_bus_layout_changed));
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}
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AudioStreamPlayer::~AudioStreamPlayer() {
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}
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